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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                  ------------

                                 SCHEDULE 13G/A

        INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES
    13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (b)
                               (Amendment No. 2)*

                             QuickLogic Corporation
--------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    74837P108
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                               December 31, 2003
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

      |_|   Rule 13d-1(b)

      | |   Rule 13d-1(c)

      |X|   Rule 13d-1(d)

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).


                               Page 1 of 17 pages


CUSIP No. 74837P108                                           Page 2 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      Technology Venture Investors-4, L.P. ("TVI-4")
      Tax ID Number: 94-3088804
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |X|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      Delaware
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0 shares.
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            See response to row 5.
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0 shares.
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        See response to row 7.
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      0
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.00%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!


CUSIP No. 74837P108                                           Page 3 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      TVI Partners-4, L.P. ("TVIP-4")
      Tax ID Number: 94-3084677
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |X|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      Delaware
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0 shares.
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            See response to row 5.
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0 shares.
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        See response to row 7.
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      0
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.00%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!


CUSIP No. 74837P108                                           Page 4 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      TVI Associates-4, L.P. ("TVIA-4")
      Tax ID Number: 94-3154357
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |X|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      Delaware
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0 shares.
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            See response to row 5.
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0 shares.
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        See response to row 7.
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      0
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.00%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!


CUSIP No. 74837P108                                           Page 5 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      TVI Associates-4 1988, L.P. ("TVIA '88-4")
      Tax ID Number: 94-3084676
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |X|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      Delaware
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0 shares.
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            See response to row 5.
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0 shares.
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        See response to row 7.
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      0
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.00%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!


CUSIP No. 74837P108                                           Page 6 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      TVI Management-4, L.P. ("TVIM-4")
      Tax ID Number: 94-3088676
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |X|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      Delaware
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0 shares.
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            See response to row 5.
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0 shares.
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        See response to row 7.
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      0
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.00%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!


CUSIP No. 74837P108                                           Page 7 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      Technology Venture Investors-3, L.P. ("TVI-3")
      Tax ID Number: 94-2944879
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |X|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      California
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0 shares.
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            See response to row 5.
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0 shares.
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        See response to row 7.
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      0
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.00%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!


CUSIP No. 74837P108                                           Page 8 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      TVI Management-3, L.P. ("TVIM-3")
      Tax ID Number: 94-2944878
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |X|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      California
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        0 shares.
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            See response to row 5.
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               0 shares.
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        See response to row 7.
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      0
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.00%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      PN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!


CUSIP No. 74837P108                                           Page 9 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      John Johnston ("Johnston")
      Tax ID Number:
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |X|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      U.S. Citizen
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        38,694 shares
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            0 shares.
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               38,694 shares
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        0 shares.
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      38,694
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.16%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!


CUSIP No. 74837P108                                          Page 10 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      David F. Marquardt ("Marquardt")
      Tax ID Number:
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |X|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      U.S. Citizen
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        74,800 shares
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            0 shares.
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               74,800 shares
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        0 shares.
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      74,800
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.31%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!


CUSIP No. 74837P108                                          Page 11 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      Robert C. Kagle ("Kagle")
      Tax ID Number:
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |X|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      U.S. Citizen
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        18,478 shares
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            0 shares.
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               18,478 shares
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        0 shares.
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      18,478
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.08%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!


CUSIP No. 74837P108                                          Page 12 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      Burton J. McMurtry ("McMurtry")
      Tax ID Number:
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |X|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      U.S. Citizen
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        27,481 shares
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            0 shares.
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               27,481 shares
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        0 shares.
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      27,481
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.11%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!


CUSIP No. 74837P108                                          Page 13 of 17 Pages
--------------------------------------------------------------------------------
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      Mark G. Wilson ("Wilson")
      Tax ID Number:
--------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a)  |_|
                                                                        (b)  |X|
--------------------------------------------------------------------------------
3     SEC USE ONLY


--------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      U.S. Citizen
--------------------------------------------------------------------------------
                  5     SOLE VOTING POWER

                        3,467 shares
                        --------------------------------------------------------
  NUMBER OF       6     SHARED VOTING POWER
   SHARES
BENEFICIALLY            0 shares.
  OWNED BY              --------------------------------------------------------
    EACH          7     SOLE DISPOSITIVE POWER
  REPORTING
   PERSON               3,467 shares
    WITH                --------------------------------------------------------
                  8     SHARED DISPOSITIVE POWER

                        0 shares.
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      3,467
--------------------------------------------------------------------------------
10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

      |_|
--------------------------------------------------------------------------------
11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      0.01%
--------------------------------------------------------------------------------
12    TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTION BEFORE FILLING OUT!


CUSIP No. 74837P108                                          Page 14 of 17 Pages
--------------------------------------------------------------------------------

ITEM 1(a).        NAME OF ISSUER:

                  QuickLogic Corporation

ITEM 1(b).        ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

                  1277 Orleans Drive
                  Sunnyvale, California 94089

ITEM 2(a).        NAME OF PERSONS FILING:

                  This  Statement is filed by  Technology  Venture  Investors-3,
                  L.P.,  a  California  limited   partnership   ("TVI-3"),   TVI
                  Management-3,   L.P.,   a   California   limited   partnership
                  ("TVIM-3"),  Technology Venture Investors-4,  L.P., a Delaware
                  limited  partnership  ("TVI-4"),   TVI  Partners-4,   L.P.,  a
                  Delaware limited  partnership  ("TVIP-4"),  TVI  Associates-4,
                  L.P.,  a  Delaware   limited   partnership   ("TVIA-4"),   TVI
                  Associates-4  1988,  L.P.,  a  Delaware  limited   partnership
                  ("TVIA-'88-4"),  TVI  Management-4,  L.P., a Delaware  limited
                  partnership  ("TVIM-4"),  Robert C. Kagle ("Kagle"),  David F.
                  Marquardt ("Marquardt"), Burton J. McMurtry ("McMurtry"), Mark
                  G. Wilson  ("Wilson") and John R. Johnston  ("Johnston").  The
                  foregoing  entities and individuals are collectively  referred
                  to as the "Reporting Persons."

                  TVIM-3 is the general  partner of TVI-3,  and may be deemed to
                  have sole power to vote and sole power to dispose of shares of
                  the  issuer  directly  owned  by  TVI-3.   Kagle,   Marquardt,
                  McMurtry,  Wilson and Johnston are the members of TVIM-3,  and
                  may be deemed to have shared power to vote and shared power to
                  dispose  of the shares of issuer  directly  owned by TVI-3 and
                  TVIM-3.

                  TVIM-4 is the  general  partner of TVI-4,  TVIP-4,  TVIA-4 and
                  TVIA  `88-4,  and may be deemed to have sole power to vote and
                  sole power to dispose of shares of the issuer  directly  owned
                  by TVI-4,  TVIP-4,  TVIA-4 and TVIA '88-4.  Kagle,  Marquardt,
                  McMurtry,  Wilson and Johnston are the members of TVIM-4,  and
                  may be deemed to have shared power to vote and shared power to
                  dispose  of the  shares  of  issuer  directly  owned by TVI-4,
                  TVIP-4, TVIA-4 and TVIA `88-4.

ITEM 2(b).        ADDRESS OF PRINCIPAL BUSINESS OFFICE, OR, IF NONE, RESIDENCE:

                  The address of the principal  office for each of the Reporting
                  Persons is:

                  Technology Venture Investors
                  2480 Sand Hill Road, Suite 101
                  Menlo Park, CA  94025


CUSIP No. 74837P108                                          Page 15 of 17 Pages
--------------------------------------------------------------------------------

ITEM 2(c)         CITIZENSHIP:

                  TVI-3 and TVIM-3 are California limited  partnerships,  TVI-4,
                  TVIM-4,  TVIP-4,  TVIA-4 and TVIA '88-4 are  Delaware  limited
                  partnerships,  and  Kagle,  Marquardt,  McMurtry,  Wilson  and
                  Johnston are United States citizens.

ITEM 2(d).        TITLE OF CLASS OF SECURITIES:

                  Common Stock

ITEM 2(e).        CUSIP NUMBER:

                  CUSIP # 74837P108

ITEM 3.           Not Applicable



CUSIP No. 74837P108                                          Page 16 of 17 Pages
--------------------------------------------------------------------------------

ITEM 4.           OWNERSHIP:

The following  information  with respect to the ownership of the Common Stock of
the issuer by the persons  filing this  Statement is provided as of December 31,
2003:

                           (a)    Amount beneficially owned:

                                  See Row 9 of cover  page  for  each  Reporting
                                  Person.

                           (b)    Percent of Class:

                                  See Row 11 of cover  page  for each  Reporting
                                  Person.

                           (c)    Number of shares as to which such person has:

                                  (i)     Sole  power to vote or to  direct  the
                                          vote:

                                          See  Row  5 of  cover  page  for  each
                                          Reporting Person.

                                  (ii)    Shared  power to vote or to direct the
                                          vote:

                                          See  Row  6 of  cover  page  for  each
                                          Reporting Person.

                                  (iii)   Sole power to dispose or to direct the
                                          disposition of:

                                          See  Row  7 of  cover  page  for  each
                                          Reporting Person.

                                  (iv)    Shared  power to  dispose or to direct
                                          the disposition of:

                                          See  Row  8 of  cover  page  for  each
                                          Reporting Person.

ITEM 5.           OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:

                  If this statement is being filed to report the fact that as of
                  the date  hereof,  the  reporting  person has ceased to be the
                  beneficial  owner of more  than five  percent  of the class of
                  securities, check the following: [X]


CUSIP No. 74837P108                                          Page 17 of 17 Pages
--------------------------------------------------------------------------------

                                   SIGNATURES

                  After  reasonable  inquiry and to the best of my knowledge and
belief,  I certify  that the  information  set forth in this  statement is true,
complete and correct.

Dated February 9, 2004

Entities:         Technology Venture Investors-4, L.P.
                  TVI Partners-4, L.P.
                  TVI Associates-4, L.P.
                  TVI Associate-4 1988, L.P.
                  Technology Venture Investors-3, L.P.
                  TVI Management-3, L.P
                  TVI Management-4, L.P.


                                              By: /s/ Mark G. Wilson
                                                  ----------------------------
                                              Mark G. Wilson, Attorney-in-Fact
                                              for the above listed entities

Individuals:      Mark G. Wilson
                  John Johnston
                  Robert C. Kagle
                  David F. Marquardt
                  Burton J. McMurtry


                                              By: /s/ Mark G. Wilson
                                                  ----------------------------
                                              Mark G. Wilson, Attorney-in-Fact
                                              for the above listed individuals